"Wadu Hek" are the only two words in the Wadustani language, a language invented by Twitch Streamer and stream sniper, Wadu.

Wadu hek is a predominant code used to say “send booty pics” or to send nudes in general. it is also general used by the famous Wadu in PUBG who is one of Twitch’s Shroud’s most dedicated stream snipers.

wadu hek is a stupid way of saying "What the heck", famous from a semi-big streamer Scoutiver

The best stream sniper on the whole planet earth you can ever find. It appears that wadu has a rare disease that limits his vocabulary to only two words "wadu" and "hek".
Wadu became known when former pro counter strike "shroud" stepped down from the cs scene and started playing "PUGB" and became a full-time streamer on twitch.tv . Shroud meets Wadu ever so often and the moments are hilarious, because Wadu is always creative on surprising Shroud. Lately Wadu have become popular in the PUBG scene and he absolutely deserves it.