When something doesn't go your way and you start to question everything you know.

Also a (meme)

"No Homo Tho" is a term frequently used within a group of straight males to assert their heterosexual identity whenever any one of them has made a statement entailing his homosexuality. An important quality of this declaration is that it has the effect of negating/overriding any previous statement made, no matter how incriminating. Sometimes abbreviated: N.H.T

A more determined/insistent version of "WTF", which of course means "What the f***." Often augmented by the addition of the word "really."

Placed at the end of an advice message, it is the ultimate way of saying, "Just because I said this, it means you can't ruin your life".

boom tho
adv. 1: An occurance of an uncommonly good thing.
2. An exclaimation or show of excitement.
boom got them tho!
verb. 1a: The self completion of an uncommonly good thing.
1b: The successful act of mating.
boom got them dos!
verb. 1: The exact double of boom got them tho!
2: The completion of a difficult shot attempt on the basketball court.

An abbreviation of "Why, though?" mainly used as a joke or pointless comment in online discussions.

The phrase picked up a large following in popular random-topic communities on GreatestJournal.com.

But y tho is simple questioning something. It can also be the meme below, a variation of said meme, or a reference to the meme below. It's just a bastardization of "But why, though?"