hook up with

VERB
12 LETTERS · STARTS WITH H

hook up with is a valid 12-letter word worth 25 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
H4O1O1K5U1P3W4I1T1H4
4 + 1 + 1 + 5 + 0 + 1 + 3 + 0 + 4 + 1 + 1 + 4 =25 PTS
DOUBLE WORD → 50TRIPLE WORD → 75
MEANING

What does hook up with mean?