One of higher social standing, attractiveness, or intelligence level whom chooses to prey on those whom are poor, weak, or vulnerable.
Hitler and company tended to paint Jews as bottom feeders with regards to how they treated the poor in Germany.
The JAP (Jewish American Princess) girl attaches herself to the lower socioeconomic degenerate in high school who has nothing, so that he focuses all his energies and attention on her.
"She wanted to take things slow, so we just did some BottomGrinding for a few hours" or "She was on the rag, so Bottom Grinding was the only clean option"
A song played at a gay dance club which bottoms (sexually receptive gay males) particularly enjoy dancing to. The beat, melody or thematic content of said song must be highly compatible with the movement of bottoms and be particularly enjoyable and fulfilling to dance to in a provocative fashion.
The 'draw' you put things you are saving for the future into. A holiday, marriage, family, etc.
Ted: Coming to the lads weekender this year bob?
Bob: Nah Ted, moneys going in my bottom draw, getting married enit!
Ted: Ahh, ya fat lard, come out with the lads man!