Mmmmph mmmmph, mmmmm mmmmmp mmmmmph. Mmmmmph mpm! Mmmmmph mph mm! Hm mmmmmph, hmmmmph mm mmmmmph mmmmmph!
(Clicking the “mph” in the original post on tf2.com takes you to their movies page.)
IT’S GOING DOWN
I don’t know Morse code so I can’t confirm it, but APPARENTLY this could be “translated” to Monday using morse code.