I can't count the number of times I've been tying something down with rope only to find I don't have my knife or razor handy, forcing me to yell for help or simply let the rope go slack and start over again.
But as it turns out you don't need a blade to cut thick string- because you can cut it with your bare hands.
Scott Wadsworth of the Essential Craftsmen YouTube Channel demonstrates how string-on-string friction can cut through thick string without a blade, but if you try this trick out for yourself you may want to wear gloves.
-Via Lifehacker