Root: Pion
A pion is a type of subatomic particle.
Pion may also refer to:
PION, gene; see Protein pigeon homolog
2S7 Pion, self-propelled gun
Pión District, in Peru
Posterior ischemic optic neuropathy
Pio Pion (1887 – 1965), Italian entrepreneur
Given the first result, a type of subatomic particle, to pionate means to act like a subatomic particle.
They are unstable, with the charged pions
π+ and π−decaying with a mean lifetime of 26 nanoseconds (2.6×10−8 seconds), and the neutral pion π0 decaying with a much shorter lifetime of 8.4×10−17 seconds. Charged pions most often decay into muons and muon neutrinos, while neutral pions generally decay into gamma rays.
So what they are telling us is that either they are small and unstable or they are looking for someone small and unstable.