The combination of squint and frown/smile, and usually coupled with brisk nodding of the head. Direct eye-contact is paramount.
Best man:"During the toast, that was totally a joke about me doin' the bride before you did.... hope I didn't cross the line bro." Groom: with a deniroface;" Little bit, crossed it a little bit."
To brutally kick or stamp on someone whilst they are on the ground in the manner of Robert Deniro's portrayal of Jimmy Conway in the film Goodfellas, where they were murdering Billy Batts.
an award for something well done
usually consisting of a thumbs up and a grin similar to one Robert Deniro would make if he was impressed.
friend1: "hey check it out i discovered a way to turn water into gasoline"
friend2: "thats amazing we'll never need to pay for gas again!!!"
friend3: i think he deserves a deniro face
When you bang the bejesus out of the homely office secretary after getting tanked in front of the whole office staff. This makes for extremely awkward and uncomfortable situations every time you avoid eye contact with her in the office and everyone else laughs like a hyena behind your back.
Did you hear? Colin pulled an Awkward DeNiro with the secretary last night. What a flaming douche bag!