Encyclopedia of Dreams

by Michael and Elizabeth Thiessen
if you are skillful at swinging a lasso in circles in your dream this denotes happiness in love and family affairs .If you are inept at it and cause the rope to tangle, you will be caught up in an embarrassing situation due to love entanglements.

If you lasso an animal with it you will win your love, but if the animal gets away, you are doomed to failure.

New American Dream Dictionary

by Joan Seaman - Tom Philbin
1. The ability to initiate love relationships (note if the lassoing was done well or badly).

2. A need for some restraint, likely re­garding behavior.

3. A strong sense of or urge for control, often over people; social conformity (as in “riding the herd”).

The Complete Guide to Interpreting Your Dreams

by Stearn Robinson - Tom Corbett
Swinging a lasso in your dream is a happy omen for love or domestic affairs, providing it was done with reasonable skill; but if the rope got tangled, or you were caught in the loop, you are in for an embarrassing experience.