Stick wobbly bottom in goulash, being vulgar (6)
I believe the answer is:
kitsch
'vulgar' is the definition.
(I've seen this before)
'stick wobbly bottom in goulash' is the wordplay.
'wobbly' is an anagram indicator.
'bottom in' says to take the final letters (in a down clue, the letter at the bottom).
The final letter of 'goulash' is 'h'.
'stick' with letters rearranged gives 'kitsc'.
'kitsc'+'h'='KITSCH'
'being' acts as a link.
(Other definitions for kitsch that I've seen before include "2 art" , "Garish or vulgar items" , "Garishly sentimental items" , "Maudlin art" , "in vulgar fashion" .)