An expression used when you see a girl that you would get with. Note there are only two types of expression: 'Straight In' or 'Not Straight in'.
Also see: DTF
Adam: Ohhh fuck look at her!!
Jalal: Straight the fuck in!!!
Nakul: What about her guys?
Adam: Nakul what's your fucking problem? Not Straight In at all..
The process of by which a renoundly mocked fella, gets his kicks from bragging about his access to a club.
Renoundly mocked fella: ... so yeah i just got straight in!