Keyword Analysis & Research: why is it called a trapper keeper

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why is it called a trapper keeper	0.65	1	4164	17	33
why	1.18	0.1	2514	11	3
is	1.91	0.9	2336	75	2
it	0.49	0.2	7899	51	2
called	0.34	1	7925	81	6
a	0.71	0.7	3318	42	1
trapper	1.39	0.6	5775	6	7
keeper	1.48	1	7877	47	6

Keyword	CPC	PCC	Volume	Score
why is it called a trapper keeper	0.09	0.9	7165	95