In the excruciating two-minute-and-five-second span of the trailer for Big Mommas: Like Father, Like Son, I counted two fatty-fall-down jokes, two-nut-shot jokes, one fat-people-are-gross joke, but all of the humor is exactly what you would expect from the third movie in the Big Momma's House franchise.  This time Martin Lawrence is going undercover with his son because his son witnessed a crime and witness protection only works if you're in a fat suit.  Sure, guys might want to make out with you and you won't be able to hit on women, but that's how Witness Protection works.  And if you're wondering how these movies keep getting made, you should know that the previous two films grossed a combined worldwide total of $311 million.  Now try not to think of all the movies you loved that flopped at the box office.

Hit the jump to check out the trailer.  Big Mommas: Like Father, Like Son opens February 18, 2011.

Trailer via MSN.

Here's a synopsis for Big Mommas: Like Father, Like Son:

Martin Lawrence returns as FBI agent Malcolm Turner in this third outing in the Big Momma's House series. This entry sees Lawrence's cross-dressing alter-ego, Big Momma, heading to an all-girls school with his nephew, Trent (Brandon T. Jackson), in order to hunt down a murderer. John Whitesell directs off a script by Matthew Fogel.

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