To use an impermeable material to recreate the effect that a (condom,jonny)would have at the moment of ejaculation. String, elastic bands and other crafting methods may be utilised to achieve the desired result.
Mainly used unsuccessfully by chavs and squaddies who cant afford to buy the bulk of condoms they need for everyday life. Can be used also in a chat up line such as 'lets wigwambang'.
I didnt get her pregnant cos i wigwammed (plr).