W2 does NOT mean "with". Not even close. W2 is an abbreviation for Word2 or Word Too, which are actually short versions of the phrase Word to mother or Word to everything or similar phrases that people say when they are telling nothing but the truth.
People who post on Urban Dictionary are dazed, W2.
A big mouth hippo is a person who says something is wrong one day but then goes and does that exact same thing or has already done it in the past. Calling someone a hippo is like saying look who's talking. Comes from the word hypocrite, but might also be a reference to the really big mouth of a hippo when it opens wide.
A Lil Wayne fan: Hip hop is getting so shitty nowadays..