When an establishment is full of hot women, who don't necessarily need to be hot.
For it to be Raining Trim said establishment must have a higher percentage of women to men.
Not to be confused with reining trim, when a gentleman is on a particularly hot streak with the ladies and is indeed reining in trim.
'How was the club last night Mr Sanchez?'
'Oh Gary it was awesome, it was just raining trim'
has a lot of "bling" or jewelry hanging off the body. Or "rain'n trim". First heard it on Eastbound and Down SE2E04.
He's sure raining trim, don't see how he can hold it all up!!