An interesting example of the metaphoric creation of new meanings: I guess that the gene splicing refers to the shape of the lariat and that the wrestling hold always refers to both form and function. On the other hand the pick-up truck name is simply an evocation of the great American adventure.

But I think it has the right macho connotations - so the fourth line should read:
"If someone has you in their Lariat"

BTW, TWIMC - Apart from the prose quality, I read Riona's livejournal for the occasional insight it gives into her formative family life - I try not to understand the other stuff.