The Collaborative International Dictionary
Spragging
Sprag \Sprag\, v. t. [imp. & p. p. Spragged (spr[a^]gd); p. pr. & vb. n. Spragging (-g[i^]ng).]
To check the motion of, as a carriage on a steep grade, by putting a sprag between the spokes of the wheel.
--R. S. Poole.To prop or sustain with a sprag.
Wiktionary
spragging
vb. (present participle of sprag English)