Amongst the millions of slang terms for the drunken state of the average welsh person at around 11 on a saturday, you can stand proud as the most drunk you have ever been in any valley if one of your byts refers to you as smeared.
There is no higher (or indeed lower depending on perspective) state of drunken stupor
john: you know.. i've seen boys get wasted, blllaadered, maashed, trounced, monged and even coor-don-blluured. but i've never seen anyone get as drunk as my man G did last night. He was completely smeared!
julian: tsk tsk! thats just not criket is it simon?