Underwear Dog
I took Megan to the park and was pushing her on the swing.
"I need underwear!" she tells me emphatically.
"What?" I am clueless.
"I need underwear!! Underwear Dog!"
"What? Megan, what do you want?" I am more clueless.
"I need Underwear Dog. You do Underwear Dog, like Andrew does," Megan patiently explains.
Aaah! it finally clicks - Underwear Dog! (usually referred to as just Under Dog!) A swing push wherein the pusher runs under the swing. I perform the manuever successfully, only to be met with another request:
"More Underwear Dog!"