NICK LACHEY IS A TRASH TALKER

Former 98 Degrees front man, Nick Lachey was hanging out at a Cincinnati Bengals game in San Diego on Sunday.  Apparently he's a HUGE Bengals fan, and can't keep his mouth shut while the game is going on. 

Apparently Nick was so loud that he got kicked out of the game.  After getting thrown out, Nick tweeted, "Just got kicked out of the chargers stadium and couldn't be prouder!  Go Cincy Bengals." 

After the Bengals won, he added, "Bengals win again.  I'd talk trash to everyone in SD, but what's the point?  You already had me kicked out of the stadium and you still lost."

Thanks to our friends at TMZ, we've got video of Nick getting tossed from the stadium.