Gaston's from Walt Disney's Beauty and the Beast, Luigi and Totodile are respectively from Nintendo's Mario and Pokemon and this screenshot's taken from Valve's Garry's Mod.
Inspiration: Nickelodeon's SpongeBob SquarePants's episode: Mimic Madness when he said "I'm gonna flatter your socks off." https://www.youtube.com/watch?v=ezzPFUUn9Vk 0:50-0:52

Looks like Gaston's done the impossible again, surprising Luigi with his big bobble-head and extreme confidence. Totodile is like "Big deal." as he's unimpressed, as usual, about him showing off his weird skills, thinking he's a.... well, show off.