Quasibono
When a male has half an erection, or a quasiboner.  The -er was dropped and an -o was attatched to play on the name of Quasimodo from the Hunchback of Notre Dame.
A quasibono is very frustrating as it can be perceived as a number of things.
Man that girl has a wicked body, but that face? Only gives me a quasibono.