To "go to Finsbury Park" means to go all the way on a first date. It is implied that kissing, cuddling, conversation, dinner, touching, oral sex, spanking, reading and skinny-dipping are all skipped in favour of full-blown, uninhibited sex.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.