the act of double-fisting.

note - this term implies that each hand is in a separate place (otherwise it would be Sooty & Sootying (or, arguably, Sweep & Sweeping), which sounds gash).

this phrase takes its name from the act of inserting both hands into 80s tv stars, glove-puppets Sooty (the annoying yellow one) & Sweep (the awesome squeaky one).

author's note - i would personally usually start with Sooty on the left & Sweep on the right, but this is down to personal preference.