Q:

modern English kennings

What are some other kennings in any of the major dialects of Modern Standard English? Here are a few examples in use in American English that I offer for starters:

rug-rat
rice-rocket 
eye-candy
eye-opener
tongue-lashing
jail-bait
mind-share
belly-buster
tear-jerker
coin-toss    
nail-biter   (suspenseful movie)
spine-tingler (eerie/scary movie)
night-owl
grease-monkey
disk-jockey
code-warrior
bit-cruncher
stud-muffin
saw-bones
moon-shine
block-buster  (a very popular movie)

This is a form of single-word request. I'm not looking for words with a particular meaning but a compound-noun with a particular structure.
A kenning is a compound consisting of two nouns (though sometimes adjective + noun) whose semantic relationship yields, indirectly, a nominal that is not a synonym for either of them, though one of them might be a metonym for part of the idea.
Rice-rocket, for example, is a name for 'fast Japanese motorcycle' (though I've heard it used of souped-up Japanese subcompact cars too).  Rice is a metonym for Japan.  Rocket yields fast-vehicle by synechdoche.
These are conversational everyday words, not restricted to poetical argot.

A:

There are lists of English kennings out there that can be found by googling. See, for example, here and here. I don't think anything is gained by rehashing them here.
Slurs often have the form of kennings. Further and unfortunately, they persist in common usage (among intolerant people). Because they are offensive, they are usually left off of lists. It is because they are often omitted that I include them here:

porch monkey [for African Americans]
towel head [for people who wear turbans]
rag head [for people who wear turbans]
camel jockey [for Middle Easterners]
sand nigger [for Middle Easterners]
timber nigger [for Native Americans]
wetback [for Mexicans]
slant eye [for Asians]
cock tease [for women]
fudge packer [for male homosexuals]
knob jockey or nob jockey [for male homosexuals]
bean flicker [for lesbians]
muff diver or muff muncher [for lesbians]
Bible thumper [for Christian fundamentalists]

Cocksucker and motherfucker might also be considered kennings, depending on how broad your conception of kenning is.  
There are also very many slang terms for genitals, semen, etc. which have the form of kennings. For example:

baby gravy or baby batter [for semen]
meat curtains [for the vagina]
meat scepter [for the penis]

An exhaustive list of such slang terms would quickly become, well, exhaustive.

