refuse heap

NOUN /rɪ'fjuz_hip/
11 LETTERS · STARTS WITH R

refuse heap is a valid 11-letter word worth 18 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
R1E1F4U1S1E1H4E1A1P3
1 + 1 + 4 + 1 + 1 + 1 + 0 + 4 + 1 + 1 + 3 =18 PTS
DOUBLE WORD → 36TRIPLE WORD → 54
MEANING

What does refuse heap mean?