Terangi-Bangi
This primarily Trinidadian concept refers to an extreme degree of post-relationship depression. This is known the second stage of tabanca, and when noted should be reported to a psychologist. This can involve:

1) loss of weight
2) Constant lack of sleep
3) Sudden changes in style of dress
4) Excessive alcohol consumption
5) New found love for 'chutney' (East Indian soca-esque music)
1) 'Boy Ryan and he gyul done, and all of a sudden the man drowning in rum, like Rikki Jai and not leaving his house. Ah tink it is terangi-bangi!'