mantasize

To fantasize about a man

Kate: Why do you keep looking at that guy?

Ashley: Oh I can just mantasize us making out!

Mantasizing

The act of (typically a man) fantasizing about another man, whether sexual or otherwise. Often the result of a Bromance or Mancrush

"Wow bro, I was totally Mantasizing about you last night dude."
"uhh...nahh..."

"Go Mantasize about him. You guys are friends, and he'll probably like it."