look up any word, like ratchet:
 
2.
The act of pushing your head deep enough into a woman's vagina so that your tongue can touch her anus. Thus, you appear to be wearing an attractive top hat. It is Mexican because the tongue to anus is absolutely disgusting and dirty.
I got a Mexican Top Hat from my girlfriend last night, and it was the sickest thing I've ever experienced.
by Your filthy disgusting daddy February 06, 2008
 
1.
instead of rolling the tip of your joint, you burn it hence causing the top of the joint visible, therefore it looks like a mexican sombrero.

Burns better and slower
yo subarú make that fat king size a nice mexican top hat
by Alejandro911 December 19, 2010