Aston Villa manager Tim Sherwood has revealed in-demand defender Ron Vlaar has told him he wants to stay at the club.
Arsenal manager Arsene Wenger believes squad size is crucial ahead of a potentially busy summer of transfer activity.
The 28-year-old will complete the temporary switch to Tannadice subject to international clearance.
The forward won a move to Brentford last summer after netting 28 goals in the Scottish First Division with Falkirk.
United boss Jackie McNamara said: "This is the ideal time for us to bring in Farid.
"He scores goals, has strong aerial ability and will hold the ball up and allow his fellow attackers to get involved.
"We have moved quickly to secure him because there was interest from other clubs and I am delighted to sign him.
"He will bring something a little different from what we have at the club and will enhance our attacking threat."