Hold the weights over head and bend at the elbow. Weight will come down behind the head. Go back to starting position. 15 reps - 3 -4 sets. Each arm.
Bend over at waist with back flat. Arms to your side even with back. Bend at elbow. Now straighten arm lifting weight so that weight is parallel to you back. Triceps extensions.
Push ups are good. as many as you can do.
Chair dips. Sit on chair. Place both hands on either side of chair edge next to butt. Slide butt off chair with legs at almost 90 degree angle (easiest) or extended in front on floor. Lower your body down and back up. Do as many as possible. 3 sets.
All those should help build muscle in arms which will reduce the flab.
