Nettle

Any plant whose foliage is covered with stinging, mildly poisonous hairs, causing an instant rash.

Certain plants that have spines or prickles:

Certain non-stinging plants, mostly in the family Lamiaceae, that resemble the species of Urtica:

Loosely, anything which causes a similarly stinging rash, such as a jellyfish or sea nettle.

Of the nettle plant and similar physical causes, to sting, causing a rash in someone.

"The children were badly nettled after playing in the field."

To pique, irritate, vex or provoke.