Usually involves one female partner testing a wide range of dildos on the other female partner.
When one partner is strapolating the other, the latter partner is said to be being "strapolated" by the other partner (present tense).
Once the female partner being tested on cannot take a larger dildo without being in excruciating pain, she is said to be "strapolated" (as the correct strapon length & width has been determined). This being the past tense.
When one partner is strapolating the other, she is said to be undergoing, "strapolation".
Strapolation must be undertook with extreme care, as an overly large dildo used as a strapon can cause serious harm to the partner who is having the dildo inserted into her. When such occurs, this is known as, "overstrapolation", as the partner has over-estimated how much of a dildo her partner can take. "Understrapolation", occurs when the partner strapolates a smaller dildo than is required, thus leaving the partner dissatisfied.
"That looks a bit big for me Emily..."
"No, I've just strapolated you, and its fine".
"What are you doing Rebecca?"
"Oh I'm just trying to strapolate for Erin, but she keeps moaning about it when I try."
"Damn it Mel! You f***ing over-strapolated again, that really hurts!
"Yeah... it feels alright I guess. Are you sure you didn't under-strapolate again.
After a very gruelling hour, Jo finally strapolated Lauren, and the enjoyed a very pleasant half an hour with each other
Whilst Anna was busy strapolating Rose, she became aware that she was very aroused.