To get
drunk or start drinking before the hang over from last night has worn off.
Thus having something to "
tie onto"
To tie one drinking
session to another before the effects/consequences of the last have expired.
Guy
1: Hey, what's going on there?
Guy 2: I'
m hungover as fuck, they had quarter pitcher night at Jake's last night.
Guy
1: So you're just going to hang out?
Guy 2: Fuck it lets tie one on.
Guy
1&2: *Crack open beers and commence drinking*